1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843da2b26df3afb0287bf40e6c449e7c4e51f248691454a71432f85ac90c0e64. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39a42e3f-537a-4946-91e0-9b86ec9d0096.json and https://artists.proofprofile.net/proofs/artist/39a42e3f-537a-4946-91e0-9b86ec9d0096.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74ded000a28c402f509cb928a34a93634dc49c1b35bfd5fa8b19d59f39f8d93. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362d2c4e96e5ea89b051061321413c2173c77434d997ba9751713c6dbeb9a4ce. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691b7e4b7d39e120b0ffc561389e5429ca96101a4d54a7a5cb4641e3999772a9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907694ddfb245e26a6ef6b247ce4f1978c04b31e9833406637356a59daad57cc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16195cde883d849dcb4d8ca330a38313d0f505514a75a4d9d180d4e86152c83. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJX31844010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4ac1f2c96157236211e7189881541e8ebb996cdc7ab351803c99b9d8d98e03. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJX31844011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb302e69ea688a1fbe590a75d909d5993ec887b70c90e889507c45568c8b3775b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJX31844012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd939bfc3041844b72c2728c9792c7422fd77f427d1b23dac8a282e5ac4cc507f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJX31844013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e7748a2767775d4d5008b96d3a73df826b2a2d2ae99d0245680ce8ba018d81. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1900559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b60243fcb14774b322ff2c01c605449c49ff69ec7f535a18e80323f0c43532a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1900560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18167a4f60d112d1d4dcc2a010e203f028d05dec82122842e0a11efe1dfe1bb3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1900561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1cf4ef81d66523e0283b9105943d87d983f5c36597232ee20af3d252501327. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1900562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cbf20c42ac362fcf6d0e44f457fbf234d78f3321d2336d68085ecc87d2d67f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727fb3b22d8871ac06ba04c1f783773fd6a1588240ca9df66e3fed9f0e7746b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2139ab960999e6d60cbed57a436b7f7bb771204313936eddc508372be6d5f2fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaed24ba1d05fcab3ac4ece65dbc75a5ed78c30eb5880228ecf614b2ed606980. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9e9566992ff409ab0d6a8ee3e41b11af4ba3402135ee7cf2c449bf205b48d8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bef232770a615c8022aebdb6db86d521c5f515997c80b705e2ba0dcc26999f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb9e3425bc5813bb2ab019dc2064566a162e5104a0617f640f22437fb92a59a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd065f04e95b220292bd56735184fcc98e10bd3106f86385640c753810b01f6. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767fa060b8fe43aeda72aab28c8597ad57dc733693f9e9e0faa7f670c9719378. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ffc670c3d9a7c388b4f7fb9193cf2eab840f1fbf67a4efd989dd448a51370a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06591c9ea1fc70bab9486a4a8222ed892a276bf0881bd487f8d509d17842ce6e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8075f9f5a8a233f3029855595ccd543b83bd0fe741daed5f120bc276b3572969. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAKFL1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef917fb22157dee740eeb29fc2d85ebf8ca498b6346d2a185f7d42cda26fe8c2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKA2G1803005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d8ac8a3934fd9dfeb99bd7c6a7efcee5717c52b7ea078332be1783b03db8fc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKA2G1803006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafa3327f275f740da3fb55d89f983cd7fc6db31654b0a57c65d33b8d48ef6ed. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKA2G1803007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cfb6ea8b59a73495ff2ecd198377fc59f50357bc37cf4130dbad94d50c8977. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2003535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a45670b096cb13b3bf4b70aea247ab34938885d99c690bb37be29a3e784a63. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2003536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d9b7da507715a32d4a20c133c33a6a9d95f2945659f8a30ded4edf8a34a50e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2003537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2a3649b4dcbe21f7d5353314e73e4750c25fc1fe2b7a73bf49a1f2b65b2803. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKN6K2003538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b69ad28671252d722fc6c9625381b8f694d4e5e00f85bf236299a14fe89356. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKA2G1301002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b1b3c5a200294154a9fb36321db4e6d45ad7dd2f037736de743afb6b2c16cf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKA2G1503001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe92d2862d57b79b44c3cd77b24ebf8166fe90d938b49bca2af65ab3a0641c9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKA2G1616018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4f444d4c97676a58fa3e888141d368df26f77c5bd85f1dcc4c899f62f03b31. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKA2G1901014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58095b259cc81ca1dd0fcc994f3604943685edc46009de414698d0a35fef78d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKA2G1601049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573dd00537377618bea8ed00380b0ca9de64853e3ff70b7b23ac1be5058863e5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKA2G1601024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4005453b1ee0b5f509ed31aa9943d925833c6bdfa2d5657b9166e54ccacce6ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKA2G1701074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafa3327f275f740da3fb55d89f983cd7fc6db31654b0a57c65d33b8d48ef6ed. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKA2G1803007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcc7c347cfce109a740c465fb7a25d14f9cb3eea86c19f64f9281644660e17a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKA2G1703005.